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Every V4 UUID

everyuuid.com

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Re: Every V4 UUID

#82
I looked for deadbeef-f00d-f00d-deadbeef**

but did not find it. Search is just on active page, that gets ever longer?

Re: Every V4 UUID

#85
post #82

I looked for deadbeef-f00d-f00d-deadbeef** but did not find it. Search is just on active page, that gets ever longer?

I don't think f is a valid UUID version. One of these positions should be 1–6 or so (not sure who's the authority on which version works how, IETF maybe?)

Re: Every V4 UUID

#86

For the implementation of the core logic, I probably would have gone for the lazy solution of iterating AES until the output is Alternatively just use standard Format-Preserving-Encryption, which is usually a Feistel Network, similar to what they ended up with, but built on a standard algorithm, instead of a homebrew round function.

Thank you for finally giving me a name for this concept. I've run into lots of code implementing them badly, but there's a bit of a semantic hill for others when you don't have a better name than "1-cycle permutation".

Re: Every V4 UUID

#88
I'm going to take these, please mark them as taken

ec971907-4564-46ec-b28b-d76f1a2233c8

58737c1a-9294-4ffa-8082-b5364923a59c

ba6ca980-b405-48b9-9770-252611d40ef1

Thanks!

Re: Every V4 UUID

#89
post #82

I looked for deadbeef-f00d-f00d-deadbeef** but did not find it. Search is just on active page, that gets ever longer?

That’s not a valid UUID? The version and variant parts are missing.
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